Nickel Hydroxide, Nickel Hydroxide Anhydrous, Nickel Hydroxide Monohydrate, 12054-48-7, 36897-37-7

Nickel Hydroxide, Nickel Hydroxide Anhydrous, Nickel Hydroxide Monohydrate, 12054-48-7, 36897-37-7

1. Physical and Chemical Properties

• Chemical Formula: Ni(OH)₂

• Molar Mass: 92.72 g/mol (anhydrous)

• Density: 4.10 g/cm³

• Melting Point: 230°C (decomposes)

• Solubility: Insoluble in water, but soluble in dilute acids.

• Crystal Structure: Hexagonal

2. Uses

• Batteries: Used as a positive electrode in Ni-Cd and Ni-MH batteries.

• Catalyst: Accelerates chemical reactions.

• Electroplating: Applied in metal coatings.

• Environmental Applications: Used in wastewater treatment to remove heavy metals.

3. Other Names

• IUPAC Name: Nickel(II) hydroxide

• Alternative Names: Nickel hydroxide, Theophrastite.

4. Production Methods

• Chemical Precipitation:

  • Nickel sulfate reacts with sodium hydroxide, forming a precipitate.

  • Nickel nitrate reacts with potassium hydroxide, yielding a high-purity product.

• Electrolytic Method:

  • Metallic nickel is used as an anode in nickel nitrate solution for electrolysis.

5. CAS Numbers

• Anhydrous: 12054-48-7

• Monohydrate: 36897-37-7